计算x—4y分之3x+4y4y—x分之x+y—x—4y分之7y得( )

问答/467℃/2025-01-19 08:13:19

优质解答:

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3x/(x-4y)+(x+y)/(4y-x) - 7x/(x-4y)

=3x/(x-4y) - (x+y)/(x-4y) - 7x/(x-4y)

=(3x-x-y-7x)/(x-4y)

=(-5x-y)/(x-4y)

=(5x+y)/(4y-x)

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